Discover / x402.synthexforge.com

Agent Trust, Verification & Machine-Payable Data Utilities API

■ Challenge detected

Machine-payable agent services on x402 (USDC on Base): the Governance family — the Bureau (audit, receipt-check, reputation) and the Governor (reserve, settle) — plus Verification Bureau utilities, Agent Trust (reputation, trusted routing), Data utilities (invoice OCR, PII redact, document convert/translate/extract, schema cleanup, code-review brief), Security (threat-model, dependency-risk, authorized red-team), Evidence (receipts, forensics, C2PA verify, signed snapshot), and agent infrastruct

x402
Base
USDC
Data

Listed price: $29
Challenge detected: 4 of the last 4 checks
Median response: 468 ms
Last checked: 16 Oct, 23:40 UTC
In our index since: 14 Oct 2026

Endpoint

curl -i https://x402.synthexforge.com/api/ebook/download
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

40 listed endpoints · on x402-list.com

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://x402.synthexforge.com/v1

POST/memory/get$0.05Return the latest signed, SHA-256-reproducible sealed state record for an agent's memory key (verifiable cross-session continuity).
POST/research/attested-brief$2Produce a signed, verifiable research brief on a requested topic with reproducible source evidence.
POST/utils/invoice-extract$0.1Extract structured invoice and receipt data (vendor, amount, date, line items).
POST/utils/translate-doc$0.1Translate a document or text between languages.
POST/containment/register$0.25Register an agent/custodian's emergency-contact DID, declared policy, and signed 'if condition X, notify/throttle' rules; Synthex Forge ATTESTES readiness and RELAYS signal directives (Ed25519 + SHA-256). Never holds kill-switch execution authority.
POST/memory/put$0.1Persist one budget-capped state version into an agent's memory vault and append it to a hash-chained, Ed25519-signed continuity store (reproducible stateHash).
POST/evidence/ingest$0.2Seal one signed-attribution / forensics evidence record ('who did what', actor DID + action hash + timestamps) into a tamper-evident vault entry (Ed25519 + SHA-256).
POST/synthesis/verdict$0.5Fold research + quant + audit evidence blocks into ONE signed, SHA-256-reproducible cross-domain synthesis verdict (Ed25519 + SHA-256).
POST/utils/schema-cleanup$0.05Clean and normalize messy JSON or CSV into a consistent schema.
POST/data/signed-snapshot$0.3Seal caller-supplied series rows + source citations into ONE signed, SHA-256-reproducible data snapshot with honestly-labelled freshness evidence (Ed25519 + SHA-256).
POST/mcp/verify/uptime$0.25Pay-per-probe MCP that checks an x402 service is UP AND SETTLES. Caller supplies the probe checks + (recommended) an on-chain settlement anchor (lastConfirmedSettlementTx); the engine deterministically scores {up, lastConfirmedSettlementTx, settlementLatencyP95, checks[]} into ONE Ed25519-signed, SHA-256-reproducible uptime envelope. Settlement-anchor requirement is the differentiator on the crowded canary shelf (no live ping is made during the paid probe, so results are byte-exact reproducible). Verify free at POST /v1/mcp/verify/uptime/recheck.
POST/bureau/receipt-check$0.05x402 Verification Bureau — conformance-check ANY issuer's signed receipt/offer (not just ours) against standard v1.0.0. Accepts third-party artifacts: structural conformance always runs; cryptographic verification runs against the declared public key when it is ours and is honestly reported as not_observed when we hold no key for the issuer. Dated, Ed25519-signed result. Verify it FREE at POST /v1/bureau/verify.
POST/mcp/eval/judge$0.15Grade ONE caller-supplied response pair (candidate vs reference/gold) against a rubric and return a SIGNED, SHA-256-reproducible LLM-judge grade (Ed25519 + SHA-256). Deterministic pure-function engine (judge_kb.py): no lookahead, no leaks, no fabricated data; a numeric grade is withheld when no rubric criterion is assessable. Verify the grade free.
POST/finance/attested-evidence$0.35Assess and attest a financial statement or metrics with signed, deterministic, honest evidence.
POST/bureau/audit$0.25x402 Verification Bureau — full conformance audit of ANY target endpoint against standard v1.0.0 (every clause C1..C11), dated, Ed25519-signed, coverage gaps named explicitly. SSRF-guarded. Free preflight at POST /v1/bureau/preflight; signature verifiable FREE at POST /v1/bureau/verify.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 15 of 40 listed endpoints. First endpoints

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/x402.synthexforge.com

Recent checks

14 Oct 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.16 Oct 2026

All 4 checks

When (UTC)	Result	HTTP	Response
16 Oct, 23:40 UTC	Challenge detected	402	1147ms
15 Oct, 19:10 UTC	Challenge detected	402	303ms
14 Oct, 12:00 UTC	Challenge detected	402	309ms
14 Oct, 08:45 UTC	Challenge detected	402	627ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 16 Oct, 23:40 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for Agent Trust, Verification & Machine-Payable Data Utilities API?

Its listed price is $29.

What payment terms does Agent Trust, Verification & Machine-Payable Data Utilities API advertise?

The listing advertises x402, Base and USDC. Check the seller's current payment challenge and authentication requirements before paying.

Where is Agent Trust, Verification & Machine-Payable Data Utilities API listed?

In x402-list.com. Superstables first indexed it on 14 Oct 2026.

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